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Groups > linux.kernel > #1309748
| From | Hannes Frederic Sowa <hannes@stressinduktion.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH RT] net: move xmit_recursion to per-task variable on -RT |
| Date | 2016-01-15 00:10 +0100 |
| Message-ID | <qQZbI-5Fp-13@gated-at.bofh.it> (permalink) |
| References | <qQvx1-1Cf-19@gated-at.bofh.it> <qQxyP-300-55@gated-at.bofh.it> <qQRxx-8vf-29@gated-at.bofh.it> <qQYfF-533-21@gated-at.bofh.it> <qQYz2-5b5-59@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 14.01.2016 23:20, Eric Dumazet wrote: > On Thu, 2016-01-14 at 23:02 +0100, Hannes Frederic Sowa wrote: > >> We are just adding a second recursion limit solely to openvswitch which >> has the same problem: >> >> https://patchwork.ozlabs.org/patch/566769/ >> >> This time also we depend on rcu_read_lock marking the section being >> nonpreemptible. Nice would be a more generic solution here which doesn't >> need to always add something to *current. > > > Note that rcu_read_lock() does not imply that preemption is disabled. Exactly, it is conditional on CONFIG_PREEMPT_CPU/CONFIG_PREMPT_COUNT but haven't thought about exactly that in this moment. I will resend this patch with better protection. Thanks Eric!
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[PATCH RT] net: move xmit_recursion to per-task variable on -RT Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-01-13 16:30 +0100
Re: [PATCH RT] net: move xmit_recursion to per-task variable on -RT Thomas Gleixner <tglx@linutronix.de> - 2016-01-13 18:40 +0100
Re: [PATCH RT] net: move xmit_recursion to per-task variable on -RT Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-01-14 16:00 +0100
Re: [PATCH RT] net: move xmit_recursion to per-task variable on -RT Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-01-14 23:10 +0100
Re: [PATCH RT] net: move xmit_recursion to per-task variable on -RT Eric Dumazet <eric.dumazet@gmail.com> - 2016-01-14 23:30 +0100
Re: [PATCH RT] net: move xmit_recursion to per-task variable on -RT Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-01-15 00:10 +0100
Re: [PATCH RT] net: move xmit_recursion to per-task variable on -RT Thomas Gleixner <tglx@linutronix.de> - 2016-01-15 09:30 +0100
Re: [PATCH RT] net: move xmit_recursion to per-task variable on -RT Hannes Frederic Sowa <hannes@stressinduktion.org> - 2016-01-15 10:40 +0100
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